Images for high grade gliomas were extracted from different on line collections in The Cancer Imaging Archive [1]}; The
Cancer Genome Atlas Low Grade Glioma (TCGA-LGG) data collection [2]}, the Repository of Molecular Brain Neoplasia
Data (REMBRANDT) [3]} for astrocytomas and oligodendrogliomas of grades 2 and 3, and The Cancer Genome Atlas
Glioblastoma Multiforme [TCGA-GBM] collection [4]} for glioblastoma multiforme. For benign brain tumors, local image
datasets were used. Among these collections, T1-weighted images, either contrast enhanced or not, were selected and
further reviewed. Tumor lesions selected for image processing were clearly identified as such and separated from
anatomical structures.
